发送文件~接收端跳出循环

FileInputStream fis= new FileInputStream(d);
     int n;
     byte[] b= new byte[1024];
     while ((n=fis.read(b))!=-1){
      dos.write(b,0,n);
      
     }

 

FileOutputStream fos = new FileOutputStream(f);
    int n = 0;
    byte[] b = new byte[1024];
    while ((n = dis.read(b)) != -1) {
     fos.write(b, 0, n);
     int i = (int) f.length() / 1024 / 1024 / (int) d * 100;
     changeValue(i);
     if (n < 1024) {
      break;

}